RDP 2016-03: Why Do Companies Hold Cash? Equation

E[ α i | X it ,PUBLI C i ]= θ 1 X i1 + θ 2 X i2 + θ 3 X i3 ++ θ T X iT +χPUBLI C i MathType@MTEF@5@5@+=feaagCart1ev2aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLnhiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq=Jc9vqaqpepm0xbba9pwe9Q8fs0=yqaqpepae9pg0FirpepeKkFr0xfr=xfr=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@6A2C@